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Fixturing Examples

Automatic Testers For Transformers : The "AT Series"

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Leading manufacturers are using our equipment every day to test transformers, chokes, coils and other inductive components.
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AT5600 Guides

Fixturing

Audit testing with the AT5600

Voltech’s AT5600 wound component tester features an audit test
function that allows you combine the speed and productivity you need in
your manufacturing operation with enhanced levels of quality assurance.

The audit test feature performs an extended range of tests on a
programmed percentage of the production run, without interrupting
the manufacturing flow. Applying more stringent tests to a sample of
your total production run offers you total visibility of materials and
component quality, and the performance of your assembly operation.
You can choose from any combination of tests installed on your
AT5600, and any frequency of testing from “every unit” to “one in
every 999”.

Why should I use it?

The AT5600 already provides an integrated and fast environment for testing any
wound component, and can automatically store the results for trend analysis and
standard deviation checking.However, in many cases a manufacturing system may require an additional audit
procedure that sample checks parameters outside the already defined test program.
Typical use cases include:

Some standards permit fast testing of components at higher-than-rated voltage:
for example UL1411 deems Hi pot testing at 2.7kV for 1 second to be equivalent to
1.2kV for 60 seconds. The audit test function allows periodic sample testing at the
lower voltage and longer test time, to provide empirical proof of this assumption

A universal mains input transformer designed for 240V/50Hz and 110V/60Hz
operation would typically be production-tested at 240V. Audit tests would permit
sample testing of the inductance of the core at 110V, and transformer response at
60Hz

Subjecting one in every 100 units to an audit test of magnetizing current across a
spread of frequencies might be used to check that the core material is consistent
across a batch

How do I program audit tests?

The latest version of the AT EDITOR software (V3.44.00 and above) allows you to specify any sequence of
tests as Audit Tests. These will be run at the frequency of your choosing.
Click images to zoom.

Step 1

Specify your “General Tests” to be executed each time in the normal way.

Step 2

Click on the “Audit Tests” tab, and add your
optional “Audit Tests” in a similar way.

Step 3

Finally, under “Program>Options” Specify how
often you would like your Audit Tests performed.

Will the Audit Test Feature work on my AT3600 / ATi tester?

The periodic additional testing provided by the Audit Test Feature is available only on the AT5600.
It is not offered by the AT3600 or ATi.

However, you can still use test programs developed for the AT5600 with previous generation Voltech equipment.
The main test program will run on the older testers, and the Audit Tests will simply be ignored.

This common programming approach simplifies test program generation and maintenance, and makes it
easy to build test environments that contain any mix of AT5600, AT3600 or ATi testers.